Josh Paetzel has announced the availability of the fourth beta release of FreeNAS 8.2.0, a specialist FreeBSD-based operating system which provides free Network-Attached Storage (NAS) services: "The development team is pleased to announce FreeNAS 8.2.0-BETA4, available for immediate download. We've done a complete re-factoring of the plugin networking stack to allow greater flexibility and functionality. We've added the ability to upgrade plugins, as well as the plugin jail itself. There have been numerous bug fixes and improvements over previous beta releases. The GUI upgrade format changed in 8.2.0-BETA3 from xz to txz. What this means is that if you are attempting to do a GUI upgrade to 8.2.0-BETA4 from 8.2.0-BETA3 use the .txz version of the GUI_Upgrade file. If you are upgrading from any previous version use the .xz file.